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CONDENSED BALANCE SHEETS (USD $)
Mar. 31, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 24,198,456 $ 27,629,359
Accounts receivable, net 3,174,724 3,476,718
Inventories, net 5,404,275 5,735,589
Other current assets 604,082 1,065,641
Total current assets 33,381,537 37,907,307
Property, plant, and equipment, net 11,324,601 10,910,172
Intangible and other assets, net 277,647 279,965
Total assets 44,983,785 49,097,444
Current liabilities:    
Accounts payable 3,845,655 5,107,778
Litigation proceeds subject to stipulation 7,724,826 7,724,826
Current portion of long-term debt 201,982 247,064
Accrued compensation 643,453 815,044
Dividends payable 57,613 57,613
Accrued royalties to shareholders 496,242 602,209
Other accrued liabilities 1,559,139 1,975,018
Income taxes payable 4,807 90,972
Total current liabilities 14,533,717 16,620,524
Long-term debt, net of current maturities 3,539,796 3,576,932
Total liabilities 18,073,513 20,197,456
Commitments and contingencies - see Note 6      
Preferred stock $1 par value:    
Common stock, no par value      
Additional paid-in capital 59,031,842 58,983,166
Retained deficit (32,019,906) (29,981,514)
Common stock in treasury - at cost (1,096,609) (1,096,609)
Total stockholders' equity 26,910,272 28,899,988
Total liabilities and stockholders' equity 44,983,785 49,097,444
Series I, Class B
    
Preferred stock $1 par value:    
Preferred stock 103,500 103,500
Series II, Class B
    
Preferred stock $1 par value:    
Preferred stock 178,700 178,700
Series III, Class B
    
Preferred stock $1 par value:    
Preferred stock 130,245 130,245
Series IV, Class B
    
Preferred stock $1 par value:    
Preferred stock 542,500 542,500
Series V, Class B
    
Preferred stock $1 par value:    
Preferred stock $ 40,000 $ 40,000